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Do you have access to a frequency counter? A way to read the actual channel that it transmits on would be a good start. Has anyone been tweaking internal adjustments? This is not a common problem in that radio, but if someone twisted the wrong tuning slug, odd things could result. 73

Finally got a wild hair to lay out this toy. Here's the first approximation. Green traces are on top, red on the bottom. I only use two-sided pc boards. If someone finds an error here, please speak up. Probably won't try to order this one right away. 73

If they had video surveillance of the RatShack dumpster 55 years ago, things would have been different. 73

This many years down the road, sticking to items we could schlep on a bicycle was kinda limiting. Did score some speakers and broken audio stuff later when I could drive. Nothing memorable stands out. 73

QSO with the clouds. 73

Diving RatShack's dumpster. 73

Used to tell folks to go ahead and try whatever BS they were interested in. Never mind everyone who says it won't work as claimed. You'll find out first hand whether they're all morons, or if you're one for ignoring them. 73

The demand for the products fell below the limit where you can justify the operating cost. Good service won't be cheap for the employer to buy. 73

Used to repair a lot of rotator control boxes. Lightning would enter the building through the electric service. Naturally it's looking for exactly one thing. The lowest-impedance path to ground. The best ground in the building would be the tower. Surge path was up the control box's power cord...

A search on fleabay for "FT-757 CAT cable" turned up a bunch of sources, mostly with a FTDI USB serial port. 73

Gargled Gallium Nitride MOSFETs. TI, S-T and Infineon came up. Every one I found is surface mount. Only one that had any specs to offer was Infineon. Doesn't look like they'll be offered in a package with wire leads you can home-brew easily. 73

MOSFETs designed to be RF power amplifiers have SWR protection. They also cost ten, twenty times or more what the mass-produced switchmode power-supply MOSFETs like the IRF520, FQP13N10, etc sell for. That price difference is 100 percent why you see them in a CB or 10-meter radio. They don't...

Or is it a bitX that's been modded for mass production? 73

The ones that get overheated and have to be replaced are mostly in DC circuits. The fix is to use a replacement rated for twice or triple the original part's wattage rating. A DC circuit won't care what kind of resistor. Only RF circuits are affected by a resistor's construction. And if you're...

Hey, just lose CW, use that circuit for LSB. Way simpler. Why didn't I think of that? Very doable. 73

Sure enough. Almost five years ago. https://www.worldwidedx.com/threads/browning-mark-3-ssb-12-volt-relay-substitute.260265/ 73

The explanation is easy. Simplification. The 350-Volt B+ supply is already there. In bulk quantities the 110-Volt DC relay would cost just the same as one built for 12 Volts. Only calls for the one 10-Watt resistor to drop 200-odd volts and leave 100 or 110 for the relay coil. A separate...

With all due respect, that's where this mod will remain. A casual look at the schematic reveals parts that were left out of this radio you would need for LSB. I don't have a pic of the circuit board layout. If there are empty holes where those parts would have gone in a separate model radio...

Forgot I had this one. It's about two by three feet, laminated. The guy who let me copy it was a RCI dealer at the time. If I discover more models that use this board, I'll update the list. Only cost $18.33 to get this one scanned to a PDF. 73

There are three oscillator circuits in the Mark 3 SSB transmitter. One set of 23 16 MHz crystals, one for each channel. One set of three for the carrier feeds into the sideband modulator. For AM, this feeds directly into the sideband filter. One crystal for upper, one for lower and one for AM...